The deck filled with these was lots of fun to play against the weaker training AIs, but I suspect even they'll be able to slaughter it now that noble's been nerfed. Previously you could play two nobles and one rift in the first two turns, but now you can only play one noble or one rift. The deck was never, ever going to be competitive anyway, but to keep the fun alive maybe it could get a buff?
1 cost spammable rifts proved overly strong in combination with verore channeler and siphoner, but I'm sure something else could be done. Hearthstone apparently has a similar card that lowers the cost of the created card to compensate for what you already paid. Alternatively it could be changed to say something like "A random character from Infinity Wars is created in your hand. Then remove every Contained Parallel Rift in your hand and your deck from the game and replace them with random characters from Infinity Wars." That way you'd only have to pay the extra resources once.